It was all working fine until 2 weeks ago but then it stopped working. I'm having a problem getting access to my phone book on my phone via my car (Bentley).

I can pair the phone fine to my car and dial numbers but when I try and access the phone book, nothing happens.

The app appears to be working fine and when I first paired it with my car I was prompted with a message to allow my car access to my phone book. The car just says its is "synchronizing my phone book" but doesn't. The address book is empty.

I've tried re-installing the app, and messing about with configuration, tests are all are fine and my phone is rooted.

Did you already try my phonebook app? The "Premium" phone has some problems with the Android Bluetooth phonebook transfer, see viewtopic.php?f=13&t=488 below "PBAP". Maybe you made some changes to your contacts database recently which triggered one of the problems. My phonebook app usually fixes these issues.